The European Union (EU) is an economic and political union of 27 member states which are located primarily in Europe. The EU traces its origins from the European Coal and Steel Community (ECSC) and the European Economic Community (EEC) formed by six countries in the 1950s. In the intervening years the EU has grown, in size, by the accession of new member states and, in power, by the addition of policy areas to its remit.

The European Union has of the seven institutions: the European Parliament, the Council of the European Union, the European Commission, the European Council, the European Central Bank, the Court of Justice of the European Union and the European Court of Auditors. Competencies in scrutinising and amending legislation are divided between the European Parliament and the Council of the European Union while executive tasks are carried out by the European Commission and in a limited capacity by the European Council (not to be confused with the aforementioned Council of the European Union). The monetary policy of the eurozone is governed by the European Central Bank. The interpretation and the application of EU law and the treaties are ensured by the Court of Justice of the European Union. There are also a number of ancillary bodies which advise the EU or operate in a specific area.